<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>Toplevel data navigation</title>
</head>
<body>
test1: clicking data: URI tries to navigate window<br/>
<a id="testlink" href="data:text/html,<body>toplevel data: URI navigations should be blocked</body>">click me</a>
<script>
  document.getElementById('testlink').click();
</script>
</body>
</html>
